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<p>The elastocaloric effect (eCE) is studied in detail for Ti<sub>50</sub>.<sub>2</sub>Ni<sub>34.3</sub>Cu<sub>12.3</sub>Pd<sub>3.1</sub> alloy in this paper. After microstructure analysis the fatigue life of elastocaloric effect (eCE) in Ti<sub>50</sub>.<sub>2</sub>Ni<sub>34.3</sub>Cu<sub>12.3</sub>Pd<sub>3.1</sub> polycrystalline alloys at different temperatures 333&#xa0;K, 334&#xa0;K and 353&#xa0;K is presented. In the fatigue test upto 10000 cycles of uniaxial compressive stress of 250&#xa0;MPa are applied at 343&#xa0;K, a minor degradation in the elastocaloric effect is observed with an efficiency of 95%. Simultaneously, a significant Δ<i>T</i><sub>adi</sub> loading of about 8&#xa0;K is also measured at 343&#xa0;K by application of 500&#xa0;MPa. The stress–strain curve shows a strain of 2% under 250&#xa0;MPa with a small stress hysteresis and low critical stress up to 100 cycles. Wide effective temperature window (Δ<i>T</i><sub>win</sub>) of 60&#xa0;K is also observed in current study during loading and unloading process all these caloric properties enable the Ti<sub>50</sub>.<sub>2</sub>Ni<sub>34.3</sub>Cu<sub>12.3</sub>Pd<sub>3.1</sub> alloy as a potential elastocaloric material.</p> Graphical Abstract <p></p>

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Fatigue-Resistant Performance of Elastocaloric Effect in Ti–Ni–Cu-Pd Polycrystalline Shape Memory Alloys

  • 期刊论文

  • 发表日期：

    2025年6月9日

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  • Muhammad Tahir Khan,
  • Xiping Li,
  • Sisi Wang,
  • Yu Wang

摘要

The elastocaloric effect (eCE) is studied in detail for Ti50.2Ni34.3Cu12.3Pd3.1 alloy in this paper. After microstructure analysis the fatigue life of elastocaloric effect (eCE) in Ti50.2Ni34.3Cu12.3Pd3.1 polycrystalline alloys at different temperatures 333 K, 334 K and 353 K is presented. In the fatigue test upto 10000 cycles of uniaxial compressive stress of 250 MPa are applied at 343 K, a minor degradation in the elastocaloric effect is observed with an efficiency of 95%. Simultaneously, a significant ΔTadi loading of about 8 K is also measured at 343 K by application of 500 MPa. The stress–strain curve shows a strain of 2% under 250 MPa with a small stress hysteresis and low critical stress up to 100 cycles. Wide effective temperature window (ΔTwin) of 60 K is also observed in current study during loading and unloading process all these caloric properties enable the Ti50.2Ni34.3Cu12.3Pd3.1 alloy as a potential elastocaloric material.

Graphical Abstract